Yamaha YFM250BT User Manual

READ THIS MANUAL CAREFULLY!
It contains important safety information.
OWNER’S MANUAL
YFM250BT
WARNING
This ATV should not be ridden by anyone under 16 years of age.
1P0-F8199-10LIT-11626-18-41
EBU00776
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INTRODUCTION

Congratulations on your purchase of the Yamaha YFM250B. It represents the result of many years of Yamaha experience in the production of fine sporting, touring, and pace-setting racing machines. With the purchase of this Yamaha, you can now appreciate the high degree of crafts­manship and reliability that have made Yamaha a leader in these fields. This manual will provide you with a good basic understanding of the features and operation of this ATV.
This manual includes important safety information. It provides information about
special techniques and skills necessary to ride your ATV.
It also includes basic maintenance and inspection procedures. If you have any questions regarding the operation or maintenance of your ATV, please consult a Yamaha dealer.
AN IMPORTANT SAFETY MESSAGE:
READ THIS MANUAL TOGETHER WITH TIPS FOR THE ATV RIDER CAREFULLY AND COMPLETELY BEFORE OPERATING YOUR ATV. MAKE SURE YOU UNDERSTAND ALL INSTRUCTIONS.
PAY CLOSE ATTENTION TO THE WARNING AND CAUTION LABELS ON THE ATV.
NEVER OPERATE AN ATV WITHOUT PROPER TRAINING OR INSTRUCTION. FREE TRAINING IS AVAILABLE TO ANYONE WHO BUYS A NEW ATV. CALL 1-800-887-2887 FOR MORE INFORMATION.
THIS ATV, AND ANY OTHER ATV OVER 90cc, SHOULD NOT BE RIDDEN BY ANYONE UNDER 16 YEARS OF AGE.
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WARNING
CAUTION:
NOTE:
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IMPORTANT MANUAL INFORMATION
FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS INJURY OR DEATH. Particularly important information is distinguished in this manual by the following notations:
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
Failure to follow WARNING instructions could result in severe injury or death to the machine operator, a bystander or a person inspecting or repairing the machine.
A CAUTION indicates special precautions that must be taken to avoid damage to the machine.
A NOTE provides key information to make procedures easier or clearer.
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IMPORTANT NOTICE
This ATV is designed and manufactured for OFF-ROAD use only. It is illegal and unsafe to oper­ate this ATV on any public street, road or highway. This ATV complies with all applicable OFF-ROAD noise level and spark arrester laws and regu­lations in effect at the time of manufacture. Please check your local riding laws and regulations before operating this ATV.
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YFM250BT
OWNER’S MANUAL
AFFIX DEALER
LABEL HERE
©2004 by Yamaha Motor Corporation,
U.S.A.
1st edition, June 2004 All rights reserved. Any reprinting or unauthorized use without the written
permission of
Yamaha Motor Corporation,
U.S.A. is expressly prohibited.
Printed in U.S.A.
P/N LIT-11626-18-41
EBU00014
WARNING
Indicates a potential hazard that could result in serious injury or death.

CONTENTS

LOCATION OF THE WARNING
1
AND SPECIFICATION LABELS....... 1-1
SAFETY INFORMATION.................. 2-1
2
DESCRIPTION AND MACHINE
3
IDENTIFICATION ............................. 3-1
Identification number records.......... 3-2
Key identification number................ 3-2
Vehicle identification number .......... 3-3
Model label ...................................... 3-3
CONTROL FUNCTIONS...................4-1
4
Main switch ......................................4-1
Indicator lights..................................4-2
Handlebar switches .........................4-2
Throttle lever ....................................4-4
Speed limiter ....................................4-5
Front brake lever..............................4-6
Brake pedal and rear brake
lever ...............................................4-6
Parking brake...................................4-8
Shift pedal ........................................4-9
Drive select lever .............................4-9
Recoil starter..................................4-10
Fuel tank cap .................................4-11
Fuel cock........................................4-12
Starter (choke) ...............................4-13
Seat................................................4-14
Storage compartment ....................4-15
Front carrier ...................................4-16
Rear carrier ....................................4-16
Rear shock absorber
adjustment ...................................4-16
PRE-OPERATION CHECKS ........... 5-1
5
Front and rear brakes ..................... 5-3
Fuel ................................................. 5-5
Engine oil ........................................ 5-7
Final gear oil.................................... 5-7
Throttle lever ................................... 5-7
Fittings and fasteners...................... 5-8
Lights............................................... 5-8
Switches.......................................... 5-8
Battery............................................. 5-8
Tires ................................................ 5-9
How to measure tire pressure....... 5-11
Tire wear limit................................ 5-12
OPERATION..................................... 6-1
6
Starting a cold engine ..................... 6-1
Starting a warm engine................... 6-3
Warming up..................................... 6-3
Drive select lever operation and
reverse driving............................... 6-4
Shifting ............................................ 6-5
To start out and accelerate ............. 6-6
To decelerate .................................. 6-7
Engine break-in ...............................6-7
Parking............................................. 6-8
Parking on a slope........................... 6-9
Accessories and loading ...............6-10
RIDING YOUR ATV ..........................7-1
7
Getting to know your ATV ...............7-3
Ride with care and good
judgement...................................... 7-4
Be careful where you ride.............. 7-16
Turning your ATV ..........................7-23
Climbing uphill ............................... 7-25
Riding downhill ..............................7-30
Crossing a slope............................7-32
Crossing through shallow water ....7-34
Riding over rough terrain............... 7-36
Sliding and skidding.......................7-37
What to do if...................................7-39
What to do ..................................... 7-39
PERIODIC MAINTENANCE AND
8
ADJUSTMENT.................................. 8-1
Owner’s manual and tool kit............ 8-1
Periodic maintenance/
lubrication ...................................... 8-3
Engine oil and oil filter element ....... 8-6
Final gear oil .................................. 8-12
Spark plug inspection.................... 8-15
Air filter element cleaning.............. 8-18
Spark arrester cleaning ................. 8-22
Carburetor adjustment................... 8-23
Idle speed adjustment ................... 8-24
Valve clearance adjustment.......... 8-24
Throttle lever adjustment............... 8-25
Select lever safety system cable
adjustment................................... 8-25
Front brake pad check .................. 8-26
Rear brake shoe inspection ..........8-26
Brake fluid level check................... 8-27
Brake fluid replacement................. 8-28
Front brake lever free play ............8-28
Adjusting the brake pedal and
rear brake lever ........................... 8-30
Adjusting the rear brake light
switch ...........................................8-34
Clutch adjustment ..........................8-35
Cable inspection and
lubrication.....................................8-35
Brake lever and brake pedal
lubrication.....................................8-36
Steering shaft lubrication ...............8-37
Wheel removal...............................8-38
Wheel installation...........................8-38
Battery............................................8-40
Replenishing the battery fluid ........8-42
Fuse replacement ..........................8-44
Replacing a headlight bulb ............8-45
Headlight beam adjustment...........8-48
Tail/brake light bulb
replacement .................................8-48
Troubleshooting .............................8-50
Troubleshooting chart ....................8-51
CLEANING AND STORAGE ............9-1
9
A. Cleaning ......................................9-1
B. Storage ........................................9-3
SPECIFICATIONS.......................... 10-1
10
NOISE REGULATION.................... 11-1
11
MAINTENANCE RECORD ............ 12-1
12
ATV LIMITED WARRANTY............ 13-1
13
YAMAHA EXTENDED SERVICE
14
(Y.E.S.) ........................................... 14-1
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LOCATION OF THE WARNING AND
SPECIFICATION LABELS
1-1
Read and understand all of the labels on your machine. They contain important information for safe and proper operation of your ATV.
2
1
2
Never remove any labels from your ATV. If a label becomes difficult to read or comes off, a replacement label is available from your Yamaha dealer.
1
Overloading this ATV or carrying cargo improperly can change handling, stability and braking performance and can lead to an accident. Never exceed the maximum front cargo limit of
: 30kg (66 lbs) NEVER sit on the carrier. Refer to instructions in the Owner’s
Manual.
WARNING
4XE-F4877-30
3
4
5
6
7
8
9
10
11
12
13
14
1-2
3
5
6
4
Overloading this ATV or carrying cargo improperly can change handling, stability and braking performance and can lead to an accident. Never exceed the maximum rear cargo limit of
: 45kg (99 lbs) NEVER sit on the carrier. Refer to instructions in the Owners
Manual.
WARNING
4XE-F4897-30
1-3
7
9
8
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SAFETY INFORMATION

AN ATV IS NOT A TOY AND CAN BE HAZARDOUS TO OPERATE.
An ATV handles differently from other vehicles including motorcycles and cars. A collision or rollover can occur quickly, even during routine maneuvers such as turning and riding on hills or over obstacles, if you fail to take proper precautions. SEVERE INJURY OR DEATH can result if you do not follow these instructions:
Read this manual and all labels carefully and follow the operating procedures described.
Never operate an ATV without proper training or instruction.
Take a Training Course.
Begin­ners should receive training from a certified instructor. Contact an authorized ATV dealer or call 1-800-887-2887 to find out about the training courses nearest you.
Always follow the age recommendation: – A child under 16 years old should never operate an ATV with engine size greater than 90cc.
Never allow a child under age 16 to operate an ATV without adult supervision, and never allow continued use of an ATV by a child if he or she does not have the abilities to operate it safely.
Never carry a passenger on an ATV.
Always avoid operating an ATV on any paved surfaces, including sidewalks, driveways, park­ing lots and streets.
Never operate an ATV on any public street, road or highway, even a dirt or gravel one.
2-1
Never operate an ATV without wearing an approved motorcycle helmet that fits properly. You should also wear eye protection (goggles or face shield), gloves, boots, a long-sleeved shirt or jacket, and long pants.
Never consume alcohol or drugs before or while operating this ATV.
Never operate at speeds too fast for your skills or the conditions. Always go at a speed that is proper for the terrain, visibility, operating conditions, and your experience.
Never attempt wheelies, jumps, or other stunts.
Always inspect your ATV each time you use it to make sure it is in safe operating condition. Al­ways follow the inspection and maintenance procedures and schedules described in this man­ual.
Always keep both hands on the handlebars and both feet on the footboards of the ATV during operation.
Always go slowly and be extra careful when operating on unfamiliar terrain. Always be alert to changing terrain conditions when operating the ATV.
Never operate on excessively rough, slippery or loose terrain until you have learned and prac­ticed the skills necessary to control the ATV on such terrain. Always be especially cautious on these kinds of terrain.
Always follow proper procedures for turning as described in this manual. Practice turning at low speeds before attempting to turn at faster speeds. Do not turn at excessive speed.
Never operate the ATV on hills too steep for the ATV or for your abilities. Practice on smaller hills before attempting larger hills.
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2
3
4
5
6
7
8
9
10
11
12
13
14
2-2
Always follow proper procedures for climbing hills as described in this manual. Check the ter­rain carefully before you start up any hill. Never climb hills with excessively slippery or loose surfaces. Shift your weight forward. Never open the throttle suddenly or make sudden gear changes. Never go over the top of a hill at high speed.
Always follow proper procedures for going down hills and for braking on hills as described in this manual. Check the terrain carefully before you start down any hill. Shift your weight back­ward. Never go down a hill at high speed. Avoid going down a hill at an angle that would cause the vehicle to lean sharply to one side. Go straight down the hill where possible.
Always follow proper procedures for crossing the side of a hill as described in this manual. Avoid hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV. Never attempt to turn the ATV around on any hill until you have mastered the turning technique described in this manual on level ground. Avoid crossing the side of a steep hill if possible.
Always use proper procedures if you stall or roll backwards when climbing a hill. To avoid stall­ing, use the proper gear and maintain a steady speed when climbing a hill. If you stall or roll backwards, follow the special procedure for braking described in this manual. Dismount on the uphill side or to a side if pointed straight uphill. Turn the ATV around and remount, following the procedure described in this manual.
Always check for obstacles before operating in a new area. Never attempt to operate over large obstacles, such as large rocks or fallen trees. Always follow proper procedures when op­erating over obstacles as described in this manual.
2-3
Always be careful when skidding or sliding. Learn to safely control skidding or sliding by prac­ticing at low speeds and on level, smooth terrain. On extremely slippery surfaces, such as ice, go slowly and be very cautious in order to reduce the chance of skidding or sliding out of con­trol.
Never operate an ATV in fast flowing water or in water deeper than that recommended in this manual. Remember that wet brakes may have reduced stopping ability. Test your brakes after leaving water. If necessary, apply them several times to let friction dry out the linings.
Always be sure there are no obstacles or people behind you when you operate in reverse. When it is safe to proceed in reverse, go slowly.
Always use the size and type of tires specified in this manual.
Always maintain proper tire pressure as described in this manual.
Never modify an ATV through improper installation or use of accessories.
Never exceed the stated load capacity for an ATV. Cargo should be properly distributed and securely attached. Reduce speed and follow instructions in this manual for carrying cargo or pulling a trailer. Allow greater distance for braking.
FOR MORE INFORMATION ABOUT ATV SAFETY,
call the Consumer Products Safety Com-
mission at 1-800-638-2772, or the ATV Distributors Safety Hotline at 1-800-852-5344.
2-4
WARNI NG
POTENTIAL HAZARD Improper handling of gasoline. WHAT CAN HAPPEN Gasoline can catch fire and you could be burned. HOW TO AVOID THE HAZARD Always turn off the engine when refuel­ing. Do not refuel immediately after the en­gine has been running and is still very hot. Do not spill gasoline on the engine or exhaust pipe/muffler when refueling. Never refuel while smoking, or in the vi­cinity of sparks, open flames, or other sources of ignition such as the pilot lights of water heaters and clothes dry­ers.
When transporting the ATV in another vehicle, be sure it is kept upright and that the fuel cock is in the “OFF” posi­tion. Otherwise, fuel may leak out of the carburetor or fuel tank. WHAT CAN HAPPEN Gasoline is poisonous and can cause injuries. HOW TO AVOID THE HAZARD If you should swallow some gasoline or inhale a lot of gasoline vapor, or get some gasoline in your eyes, see your doctor immediately. If gasoline spills on your skin, wash with soap and water. If gasoline spills on your clothing, change your clothes.
2-5
WARNI NG
POTENTIAL HAZARD Starting or running the engine in a closed area.
WHAT CAN HAPPEN Exhaust fumes are poisonous and may cause loss of consciousness and death within a short time.
HOW TO AVOID THE HAZARD Always operate your ATV in an area with adequate ventilation.
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DESCRIPTION AND MACHINE IDENTIFICATION

1. Spark arrester
2. Storage compartment
3. Air filter case
4. Engine oil dipstick
5. Front brake fluid reservoir
6. Brake pedal
7. Clutch adjusting bolt
8. Engine oil filter element
9. Rear brake light switch
10. Headlight
11. Fuel cock
12. Recoil starter
13. Fuses
14. Battery
15. Tail/brake light
16. Rear shock absorber spring preload adjusting ring
17. Engine oil drain bolt
18. Shift pedal
19. Rear brake lever
20. Handlebar switches
21. Parking brake
22. Starter (choke)
23. Drive select lever
24. Main switch
25. Fuel tank cap
26. Throttle lever
27. Front brake lever
NOTE:
The machine you have purchased may differ slightly from those shown in the figures of this manual.
3-1
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Identification number records
Record the key identification number, vehicle identification number and model label infor­mation in the spaces provided for assistance when ordering spare parts from a Yamaha dealer or for reference in case the vehicle is stolen.
1. KEY IDENTIFICATION NUMBER:
ACA-02E
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Key identification number
The key identification number is stamped on the key as shown in the following illustration. This number can be used for ordering a new key.
1
2
3
4
5
6
7
8
2. VEHICLE IDENTIFICATION NUMBER:
ACA-02E
3. MODEL LABEL INFORMATION:
ACA-01E
1. Key identification number
3-2
9
10
11
12
13
14
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Vehicle identification number

The vehicle identification number is stamped into the frame.
1. Vehicle identification number
NOTE:
The vehicle identification number is used to identify your machine.
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Model label
The model label is affixed to the location in the illustration. Record the information on this la­bel in the space provided. This information will be needed to order spare parts from your Yamaha dealer.
1. Model label
3-3
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CONTROL FUNCTIONS

WARNING
Indicates a potential hazard that could result in serious injury or death.
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Main switch

Functions of the respective switch positions are as follows:
1
2
3
4
5
6
7
ON: The engine can be started only at this position and the headlights and taillight come on when the light switch is on.
OFF: All electrical circuits are switched off. The key can be removed in this position.
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9
10
11
12
13
14
4-1
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Indicator lights
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Handlebar switches

1. Reverse indicator light “R”
2. Neutral indicator light “N”
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Reverse indicator light “R”
This indicator light comes on when the drive select lever is in the “R” position.
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Neutral indicator light “N”
This indicator light comes on when the trans­mission is in neutral.
1. Light switch “OFF/ /
2. Engine stop switch /
3. Start switch “”
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Engine stop switch /
Make sure that the engine stop switch is set to “” before starting the engine. The engine stop switch controls ignition and can be used at all times to stop the engine, especially in an emergency. The engine will not start or run when the engine stop switch is set to “”.
4-2
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Light switch “OFF/ /
Set the switch to “” to turn on the low beam and the taillight. Set the switch to “” to turn on the high beam and the taillight. Set the switch to “OFF” to turn off all the lights.
CAUTION:
_
Do not use the headlights with the engine turned off for more than thirty minutes. The battery may discharge to the point that the starter motor will not operate properly. If this should happen, remove the battery and recharge it.
_
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Start switch “”
The starter motor cranks the engine when this switch is pushed.
CAUTION:
_
See starting instructions prior to starting the engine. (See page 6-1 for details.)
_
4-3
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Throttle lever

Once the engine is running, movement of the throttle lever will increase the engine speed. Regulate the speed of the machine by varying the throttle position. Because the throttle is spring-loaded, the machine will decelerate, and the engine will return to an idle any time the hand is removed from the throttle lever. Before starting the engine, check the throttle to be sure it is operating smoothly. Make sure it returns to the idle position as soon as the le­ver is released.
WARNI NG
POTENTIAL HAZARD Malfunction of throttle.
WHAT CAN HAPPEN The throttle could be hard to operate, making it difficult to speed up or slow down when you need to. This could cause an accident.
HOW TO AVOID THE HAZARD Check the operation of the throttle lever before you start the engine. If it does not work smoothly, check for the cause. Correct the problem before riding the ATV. Consult a Yamaha dealer if you cant find or solve the problem yourself.
1. Throttle lever
4-4
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Speed limiter
The speed limiter keeps the throttle from fully opening, even when the throttle lever is pushed to the maximum. Turning in the ad­justing screw limits the maximum engine pow­er available and decreases the maximum speed of the ATV.
1. Locknut 2. Adjusting screw a. No more than 12 mm (0.47 in)
WARNI NG
POTENTIAL HAZARD Improper adjustment of the speed limit­er and throttle. WHAT CAN HAPPEN The throttle cable could be damaged. Improper throttle operation could result. You could lose control, have an acci­dent or be injured. HOW TO AVOID THE HAZARD Do not turn the adjusting screw out more than 12 mm (0.47 in). Always make sure the throttle lever free play is adjust­ed to 3.0–5.0 mm (0.12–0.20 in). See page 8-25.
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Front brake lever

The front brake lever is located on the right handlebar. Pull it toward the handlebar to ap­ply the front brake.
1. Front brake lever
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Brake pedal and rear brake lever
The brake pedal is located on the right side of the ATV and the rear brake lever is located on the left handlebar. Push down on the pedal or pull the lever toward the handlebar to apply the rear brake.
1. Rear brake pedal
4-6
1. Rear brake lever
4-7
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Parking brake
Use the parking brake when you have to start the engine or park the machine, especially on a slope. Apply the rear brake lever and push down the lock plate to apply the parking brake. Squeeze the rear brake lever to re­lease the parking brake.
1. Lock plate
WARNI NG
POTENTIAL HAZARD Improper use of the parking brake.
WHAT CAN HAPPEN The ATV could start moving unexpect­edly if the parking brake is not applied before starting the engine. This could cause loss of control or a collision. The brake could overheat if you ride the ATV without releasing the parking brake. You could lose braking perfor­mance which could cause an accident. You could also wear out the brakes prematurely.
HOW TO AVOID THE HAZARD Always set the parking brake before starting the engine. Always be sure you have released the parking brake before you begin to ride.
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